Fixing dyed or printed polyester and cellulose blend fabric - using fixing mixt. contg. urea deriv. and lower aliphatic carboxylic acid salt

摘要

In continuous 1-bath, 1-step dyeing and printing of blended polyester/cellulose fabrics with dispersion- and reactive dyes and subsequent fixing using hot air or superheated steam, fixing takes place in the presence of urea derivs., pref. dicyandiamide, (I), and salts of lower carboxylic acids, pref. AcONa (II). The new fixing compsn. is claimed. The mixt. of (I) and (II) is partic. suitable for fixing difluoropyrimidine reactive dyes at 150-220 (180-200) deg. C in 10 secs. Padding liquors are neutral. Padding both stability can exceed several weeks and printing paste stability several months. (I)/(II) system gives a higher fixing yield than (I) alone or combined with a buffer. Alkali-sensitive dispersion dyes are not attacked. Interactions are prevented.